Various options are provided as possible answers to the following questions - NSC Marine Sciences - Question 1 - 2021 - Paper 1
Question 1
Various options are provided as possible answers to the following questions. Choose the answer and write the letter (A-D) next to the question numbers (1.1.1 to 1.1.... show full transcript
Worked Solution & Example Answer:Various options are provided as possible answers to the following questions - NSC Marine Sciences - Question 1 - 2021 - Paper 1
Step 1
1.1.1 The lower eulittoral zone on a rocky shore will be exposed at …
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Answer
The lower eulittoral zone on a rocky shore is primarily exposed during a spring low tide. Thus, the answer is A.
Step 2
1.1.2 Pill bugs and sand lice are found in abundance in the upper zone of sandy beaches of the …
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Answer
Pill bugs and sand lice are notably found in the upper zones of sandy beaches along the West and South Coasts of South Africa. Therefore, the answer is B.
Step 3
1.1.3 The balance between the energy radiating to the Earth from the sun and the energy radiating from the Earth back into space:
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Answer
This balance is commonly referred to as the Greenhouse effect, thus the answer is A.
Step 4
1.1.4 Harvesting energy from tides in South Africa is not viable as …
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Answer
Harvesting tidal energy becomes impractical because the tidal range is too small in the region. Hence, the answer is A.
Step 5
1.1.5 The continuous area of water that the wind blows across in a consistent direction:
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Answer
This continuous area is known as the Fetch where the wind generates waves. Thus, the answer is B.
Step 6
1.1.6 A company develops a prototype wave generator. Which of the following does NOT form part of the research and development costs?
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Answer
Among the options given, the item that does NOT form part of the research and development costs is D (Maintenance costs).
Step 7
1.1.7 Which ONE of the combinations below shows what happens if a balloon is held in a warm car?
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Answer
When a balloon is held in a warm car, the kinetic energy of gas molecules increases while the volume of the balloon also increases. Therefore, the answer is C.
Step 8
1.1.8 Polysaccharide extracted from red marine algae and used in some brands of toothpaste:
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Answer
The polysaccharide used in some toothpastes is known as Carrageenan. Hence, the answer is A.
Step 9
1.1.9 According to the Köppen-Geiger climate system, a location that is temperate, has dry summers and is considered to be very hot, will be classified as …
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Answer
This classification corresponds to Csa within the Köppen-Geiger system, thus the answer is B.
Step 10
1.1.10 Polysaccharide extracted from a balloon containing 8 litres of air at the surface, 10 to 30 m below the surface. What volume will the gas in the balloon occupy at 30 m below sea level?
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Answer
At 30 m below sea level, the gas volume decreases, hence the volume will be 6 litres (answer B).
